Analysis of monostatic and bistatic reverberation measurements on the Scotian Shelf
Bibliographic record
Abstract
During the Boundary 2001 sea trial, a number of long-range reverberation measurements were made at a site on the Scotian Shelf between Halifax and Sable Island. The water depth was about 80 m over a sandy bottom. The sources were SUS charges dropped from either the NATO research vessel Alliance or the Canadian research vessel CFAV Quest. The receiver was the SACLANTCEN 254-m towed array aboard Alliance. The data were analyzed in two array apertures and frequencies from 80 Hz to 1400 Hz. Model-data comparisons were made using the Generic Sonar Model, with bottom parameters being extracted using both a manual procedure and an automated procedure. Direct measures of the scattering and bottom properties were made by other researchers, including Hines, Holland, and Osler. The bottom topography was fairly smooth near the site, but at long ranges there were numerous scattering features. The polar plots of the data, and model-data differences, are compared with the bathymetric features in the area. [Work supported in part by ONR Code 32, Grant No. N00014-97-1-1034.]
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".